Plants as seed traps: inter-specific interference with dispersal
Plants as seed traps: inter-specific interference with dispersal
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DOI：
10.1016/j.actao.2003.10.005
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发表时间：
2004-03-01
影响因子：
1.8
通讯作者：
Moy, IL
中科院分区：
文献类型：
--
作者：
Bullock, JM;Moy, IL
已建立的植物可能会通过物理捕获分散的种子来破坏种子沉积的模式。在这项研究中，我们量化了种子诱捕在非常精细的空间尺度，通过测量种子下降的两个杜鹃科矮灌木物种在一个范围内的距离，从异种灌木的矩阵内的短草植被。在同种异型灌木丛旁边，Calluna vulgaris和埃里卡灰葡萄的种子沉积密度比短草高7- 20倍。这种增加是相媲美的沉积密度旁边同种灌木丛，造成当地的传播，这是19-33倍大于背景种子雨。种子密度随着与异种灌木的距离的增加而迅速衰减，因此，一般来说，灌木对沉积的影响会扩大
Established plants may disrupt patterns of seed deposition by physically trapping dispersing seed. In this study we quantified seed trapping at very fine spatial scales, by measuring seed fall of two ericaceous dwarf shrub species at a range of distances from allospecific shrubs within a matrix of short grass vegetation. Next to allospecific bushes, seed deposition densities of Calluna vulgaris and Erica cinerea were between 7- and 20-fold higher than those in the short grass. This increase is comparable to deposition densities next to conspecific bushes, caused by local dispersal, which were 19-33-fold greater than the background seed rain. Seed densities decayed rapidly with distance from the allospecific bush, so that in general the bush's influence on deposition extended